オールパスフィルタとFIRフィルタの縦続接続型IIR ADFの伝送レベルが収束特性に及ぼす影響について
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- OKELLO James
- Faculty of Engineering, Tottori University
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- ARITA Shin'ichi
- Faculty of Engineering, Tottori University
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- ITOH Yoshio
- Faculty of Engineering, Tottori University
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- FUKUI Yutaka
- Faculty of Engineering, Tottori University
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- KOBAYASHI Masaki
- Faculty of Engineering, Ibaraki University
Bibliographic Information
- Other Title
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- Effect of Transfer Level on Convergence of an IIR ADF Implemented Using a Cascade of Allpass and FIR Filter
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Description
FIRフィルタと全域通過システムの縦続構成からなるIIR型適応ディジタルフィルタ(ADF)には, 伝達関数の極が未知系の伝達関数の極に収束するという特長がある.ただし, このためには, 未知系の伝送水準の推定が必要であることが指摘されている.この論文では, ADFのオールパス部を一次フィルタが構成し, ADFの極の収束特性を解析する.この解析では, 未知システムのオールパス部が実数極のみを有すると仮定している.解析結果より, 伝送水準を推定しない場合でもADFの伝達関数の極が未知系の伝達関数の極に収束する可能性があることが明らかになる.また, シミュレーションにより解析結果の検証を行う.
Adaptive infinite impulse response(IIR) digital filter implemented using cascades of allpass filters and a finite impulse response(FIR) filter, has the property of its poles converging to those of the unknown system. It has been mentioned that there is a need of estimating the transfer level of the unknown system separately in order to allow for such a kind of convergence. In this paper we analyze the convergence of the poles of the ADF when allpass section is represented using first order filters, and the unknown system has only real poles. Analysis presented shows that it is possible for the poles of the ADF to converge to those of the unknown system even if the transfer level is not estimated separately. Simulation results, also confirms this analysis.
Journal
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- Technical report of IEICE. DSP
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Technical report of IEICE. DSP 98 (262), 1-6, 1998-09-11
The Institute of Electronics, Information and Communication Engineers
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Details 詳細情報について
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- CRID
- 1573387452253502080
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- NII Article ID
- 110003279917
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- NII Book ID
- AN10060786
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- ISSN
- 09135685
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- Text Lang
- en
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- Data Source
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- CiNii Articles